Patent GB-191216174-A (GB)
Title: An Automatic Electric Supply System.
Inventor: LEITNER HENRY
IPC: H02P1/16
Filed: 1912-07-10
Granted: 1913-05-29
Abstract: 16,174. Leitner, H. July 10. Lighting systems; regulation, automatic systems and apparatus for; systems of charging and discharging galvanic batteries. -In automatic electric supply systems comprising accumulators and an internal-combustion engine and dynamo, which are started by using the dynamo as a motor, a resistance regulator of the type described in Specifications 21,145/04, 25,784/04, and 6690/06 is provided with means for energizing a starting-switch and for controlling the ignition circuit or fuel supply of the engine. A trigger-switch h or equivalent means is provided at the ` high ' end of the regulator A, so that it closes directly the regulator arm c commences to cut out the resistance a between the battery E and the load B, for example, when the load increases or the battery voltage falls. This energizes a solenoid i controlling the motor starter C, and a solenoid k, which controls the ignition or the fuel supply of the engine F. Should the dynamo D fail to generate, the movement of the arm c will continue, and, at the ` low ' end of the regulator, all the resistance a having been removed, it will open a second triggerswitch h' in series with the switch h, whereupon the generating set will be stopped. An alarm signal H may be operated at this moment through a contact m; for example, the lights may be dimmed. Under normal circumstances, when the battery voltage has risen sufficiently owing to its charge or to cessation of load, and the resistance a shall have been reinserted, the switch h will be opened by the arm c and the generating plant will be stopped; but an adjustable relay I with contacts in parallel with the switch h may be used to continue the battery charge to any desired extent. This relay is energized only through a contact q at the high end of the regulator, and may replace the switch h entirely, the switch h<1> also being exchanged for a similar relay connected to the contact m. A separate switch b, Fig. 3, operated by the arm c after it has moved a short distance from the high end of the regulator, may be used to energize the starting solenoids, the switches h, h<1> being used foi stopping only. Resistances may be progres. sively inserted in series with the coil e controlling the regulator, to vary its sensitiveness as described in Specification 6690/06. In Fig. 3, the motor starter C is operated in the first instance by the solenoid i, as previously described, the solenoid i' being energized thereupon through the contact v. The current flowing in the solenoid i is reduced after its operation by the opening of a switch w, which places the solenoid k in its circuit. Similarly, the current in the coil i' is reduced by a coil y controlled by a switch x; this coil closes a compression-relieving valve on the engine. In Fig. 4, additional slide bars a<1>, b' and a resistance a<2> comprise the motor starter, which is completed by an insulated member attached to the arm c and a switch c' operated by a coil G. This coil is in series with the switches h, h' and b and with the solenoid k. When the arm c moves from the ' high ' end of the regulator, the switch h closes and subsequently the switch b, whereupon the solenoids G and k are energized and the generating plant D, F is started. The switch c<1> short-circuits the switch b at the contact d<1>, leaving the switches h, h<1> to act as stopping switches as previously described. The movement of the regulator arm cuts out the resistance a<2> and speeds up the dynamo. A small switch e<1> is provided to bring the regulator arm back to the high end, to restart the set should the switch h' be operated.